modem sound

I use a compaq nx9000 notebook with a Conexant 56k AClink modem. On first installation, my modem worked perfectly and I could hear its sound while connecting to the Net. But after a second installation (I had to reinstall my operating system and all my applications), the modem works but I can't hear its sound although I put its sound on maximum. I have heard from some other people that they had the same problem with HP notebooks and the same modem. Is there a solutionto this problem? Thanks in advance.